Peer-Reviewed Journal Details
Mandatory Fields
Rodgers, M,Zhan, XM
2004
July
Bioresource Technology
Biological nitrogen removal using a vertically moving biofilm system
Published
()
Optional Fields
biological nitrogen removal (BNR) denitrification nitrification vertically moving biofilm system wastewater treatment BED DENITRIFICATION NITRIFICATION NITRIFIERS SUBSTRATE DYNAMICS
93
313
319
In this study, a biological nitro en removal process using a vertically moving biofilm system was used to treat synthetic wastewater. The process consisted of two pre-denitrification units, one combined carbonaceous removal/nitrification unit and three nitrification units. Each unit employed biofilm growth on a plastic module. In the anoxic units, the modules were vertically moved, while always submerged. in the bulk fluid; in the aerobic units, they were moved vertically up into the air and down into the wastewater. Three small-scale experiments, having different recirculation ratios and influent loadings, were conducted at a controlled temperature of 11degreesC. In this system, the carbonaceous removal efficiency was in the range of 94-96% and the total nitrogen removal efficiency was 77-82%. In the anoxic units, the denitrification efficiency was 94-98% and the real denitrification rates, based on the surface area of the biofilm modules, were 2.9-3.8 g NO3-N/(m(2) (.) d). The nitrification efficiency occurring in the aerobic tanks was up to 95% and the maximum areal ammonium removal rates were 1.3-1.8 g NH4-N/(m(2) (.) d). (C) 2003 Elsevier Ltd. All rights reserved.
DOI 10.1016/j.biortech.2003.09.017
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